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/*
* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
/** @file
*
* VMware logfile console
*
*/
#include <string.h>
#include <ipxe/console.h>
#include <ipxe/lineconsole.h>
#include <ipxe/init.h>
#include <ipxe/guestrpc.h>
/** VMware logfile console buffer size */
#define VMCONSOLE_BUFSIZE 128
/** VMware logfile console GuestRPC channel */
static int vmconsole_channel;
/** VMware logfile console line buffer */
static struct {
char prefix[4];
char message[VMCONSOLE_BUFSIZE];
} vmconsole_buffer = {
.prefix = "log ",
};
/** VMware logfile line console */
static struct line_console vmconsole_line = {
.buffer = vmconsole_buffer.message,
.len = sizeof ( vmconsole_buffer.message ),
};
/** VMware logfile console recursion marker */
static int vmconsole_entered;
/**
* Print a character to VMware logfile console
*
* @v character Character to be printed
*/
static void vmconsole_putchar ( int character ) {
int rc;
/* Ignore if we are already mid-logging */
if ( vmconsole_entered )
return;
/* Fill line buffer */
if ( line_putchar ( &vmconsole_line, character ) == 0 )
return;
/* Guard against re-entry */
vmconsole_entered = 1;
/* Send log message */
if ( ( rc = guestrpc_command ( vmconsole_channel,
vmconsole_buffer.prefix, NULL, 0 ) ) <0){
DBG ( "VMware console could not send log message: %s\n",
strerror ( rc ) );
}
/* Clear re-entry flag */
vmconsole_entered = 0;
}
/** VMware logfile console driver */
struct console_driver vmconsole __console_driver = {
.putchar = vmconsole_putchar,
.disabled = 1,
};
/**
* Initialise VMware logfile console
*
*/
static void vmconsole_init ( void ) {
int rc;
/* Attempt to open console */
vmconsole_channel = guestrpc_open();
if ( vmconsole_channel < 0 ) {
rc = vmconsole_channel;
DBG ( "VMware console could not be initialised: %s\n",
strerror ( rc ) );
return;
}
/* Mark console as available */
vmconsole.disabled = 0;
}
/**
* VMware logfile console initialisation function
*/
struct init_fn vmconsole_init_fn __init_fn ( INIT_CONSOLE ) = {
.initialise = vmconsole_init,
};
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